allée, feature of the French formal garden that was both a promenade and an extension of the view. It either ended in a terminal feature, such as a garden temple, or extended into apparent infinity at the horizon.
The allée normally passed through a planted boscage (a small wood); in the 17th century the boscage was square-trimmed at the sides and on top; later the sides were trained so high that the free-branching trees within the wood were invisible. As architectural gardening became unfashionable in the 18th century, the trimming of trees ceased, and the straight allée gave way to the meandering walk.